Investigators say the pair installed pinhole cameras in ATMs that could record customers' keystrokes when they typed in personal identification codes. They used that information to create fake ATM cards and make withdrawals.

Dumitru and Crainic allegedly stole more than $150,000. Both men face up to 30 years in prison and a maximum fine of $1 million when they're sentenced in November.

Seven other defendants out of 13 charged in the case have pleaded guilty.